AD8143ACPZ-R2

Overview

The AD8143ACPZ-R2 is a triple differential-to-single-ended receiver designed for high-speed signal transmission over twisted pair cables. It features three independent amplifiers with a large signal bandwidth of 160 MHz and a slew rate of 1000 V/µs at G=1. The device provides a common-mode rejection ratio of 65 dB at 10 MHz and an input common-mode range of ±10.5 V with ±12 V supplies. It operates on a wide power supply range from +5 V to ±12 V, drawing approximately 44 mA quiescent current. Two auxiliary comparators are integrated for digital signal reception.

Feature Summary

• Triple active-feedback architecture optimized for RGB video signals
• Integrated auxiliary comparators for sync pulse extraction
• Wide input common-mode range supporting ground potential differences
• User-adjustable closed-loop gain via external resistors

Applications

• RGB video receivers over unshielded twisted pair cables
• Keyboard-video-mouse (KVM) systems
• High-speed data transmission links
• Component video signal reception

Procurement Notes

Verify the specific suffix R2 against the manufacturer's ordering guide to confirm packaging configuration. Ensure compatibility with the LFCSP-32 footprint during PCB layout. Confirm that the operating temperature range meets the application requirements of -40°C to +85°C. Check for moisture sensitivity levels if reflow soldering is required.

Selection Notes

Select this component when receiving differential analog or video signals over long cable runs where common-mode noise rejection is critical. The wide supply voltage range allows flexibility in system design without isolation transformers. Consider the integrated comparators if synchronization signal decoding is needed alongside video reception.

Part Context

The AD8143 belongs to Analog Devices' family of low-cost differential line receivers. It is often paired with drivers like the AD8133 or AD8134 to form complete transmission solutions. The device utilizes an active-feedback architecture distinct from conventional operational amplifiers, offering high input impedance and excellent balance.

Replacement Considerations

Public documentation confirms the AD8145 as a compatible alternative within the same product family. Both devices share similar triple differential receiver architectures and comparator integration. Verify pinout compatibility and electrical specifications before substitution.

FAQ

How does the AD8143 handle ground potential differences between transmitter and receiver?

The device features a wide input common-mode range that maintains signal integrity even when there are several volts difference in ground potential between the drive and receive ends, eliminating the need for isolation transformers.

What is the function of the two auxiliary comparators?

The comparators are used to receive digital signals or to decode video synchronization pulses encoded on the received common-mode voltages.

Can the gain of the AD8143 be adjusted?

Yes, the closed-loop gain is user-adjustable using external resistors connected to the feedback inputs. The device is stable at a gain of 1.